I bet there are also bodies of work by posters on internet forums, social media etc. that would constitute great works if properly compiled, edited, and promoted.

Sometimes these posters are locally famous in their online communities, but in other cases they are overlooked even on their home turf. Perhaps in hundreds of years some of this stuff will be dug up and celebrated, either by humans or AI.

The same thing definitely happens with software too. There are some masterpieces of engineering out there with 15 stars on Github.